Michel Otañez, a projected member of the A’s bullpen, is expected to miss the start of the season after he was diagnosed with a right shoulder impingement. The right-hander experienced discomfort ...

The term “shoulder impingement syndrome” is sometimes used to describe a broader ... The acromioclavicular joint (AC joint) is where the acromion (the upper rear tip of the scapula) meets the clavicle ...

Repetitive overhead throwing such as in baseball is a common cause of impingement syndrome and results from the repetitive scuffing of the tendons underneath the acromion bone of the shoulder blade.